Type-writing machine.



G. W. HOWELL. TYPE WRITING MACHINE.

APPLICATION FILED NOV. 8, 1908.

Patented Nov. 1,1910.

2 SHEETS-SHEET 1.

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TYPE WRITING MACHINE.

APPLICATION FILED NOV. a, 1908.

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2 SHEETS-SHEET 2.

Patented Nov. 1, 1910.

.7 "UNITED STAT Fg PATEN T OFFICE.

CHARLES W. HOWELL, OF NEWARK, NEW JERSEY.

I TYPE-WRITING 'MAGHINE.

Specification of Letters Patent;

Patented Nov. 1, 1910.

Original application filed December 10, 1906, Serial No. 347,202. Divided and this application filed Novemher 6, 1908.

To all whom it may concern:

Be it known that I, CHARLES WV. HOWELL, avcitizen of the United States, residing in Newark, in the county of Essex and State of New Jersey, have invented new and certain useful Im rovements in Type-Writing rollers, and this application is a division of improved releasable front paper-guiding my application filed December 10, 1906,'No. 347,202.

The principal object of the invention is to provide improved and simplified mechanism 'of this character. I rovide a plate curving around the under si e of the platen and 3 extendin upwardly and rearwardly therefrom to form a paper shelf, said late mounted upon a rock shaft which is ]Ul' naled in the platen frame ends. A pressure 'roll is journalcd upon the forward portion of said plate, and a s ring acting against said plate presses sai roller' against the platen. A rear pressure roll is mounted upon yielding arms which are attached to the plate, the axis of the rear roll being preferably concentric with said rock-shaft. The rock-shaft is controlled by a finger piece, and has cam faces to force the rear roll away from the platen and detain it there. Levers are mounted upon the ends of the platen frame and operable by cams upon said rock-shaft, and provided with means-to throw the forward pressure roll away-from the platen.

A further feature of the invention is an fin er, comprising a yoke mounted upon and ad ustable along a spring-pressed bar extending along the top. of the platen, the yoke carrying a roller to run upon the platen,

and. an arm extending rearwardly from the yoke'serving as a finger piece to adjust the yoke along the bar,-and also to guide the 1 pa er at the side edge.

11 additional feature of the invention consists in means for regulatingthe line spacing movement of the prises "a plate pivoted to t e platen frame, said plate provided with a finger piece and laten, and com- Serial No. 461,276.

having serrations at its front edge at graduated distances from its pivot, and notches to correspond with the serrations and engageable by a spring-pressed detcnt to hold the plate.

The invention also'relates to means for releasing the platen from its line-spacing mechanism; and for this purpose I provide a clutch between the line-spacing wheel and the platen axle, and a thumb nut threaded upon the axle to control the clutch.

In the accompanying-drawings, Figure 1 is a sectional elevation taken from front to rear of a Sun typewriting machine showing details of the aper feedmg devices. Fig.2 1s a sectional e evation of the laten frame illustrating the pressure rol s, as thrown off from the platen. Fi 3 is a sectional elevation of one end of t e platen rotating devices, illustrating the improved line-space regulator. Fig. 4 is a front elevation of the' laten frame or carriage. Fig. 5 is a front e ovation showing the rear pressure roll and a cranked shaft for releasing the rear and front pressure rolls. Fig. 6 is a plan of the devices which guide the paper forwardly around the under side of the platen. Fig. 7 is a plan of the platen frame orcarriage and the devices thereon. Fig. 8 is a sectional view of the platen-releasing devices.

Type-bars 1 swing upwardly and rearwardly.v to strike upon the front side of a platen 5, which is mounted in a platen frame comprising a truck 6 and ends 7, 8 erected thereon; said truck being held by balls 9 upon front and rear tracks 10, 11. The tracks and platen frame are movable up and down bodily to enable different types to be written. The platen frame or carriage is driven by a spring, (not shown). Rear and front rolls 62 and 63 press against the under side of the platen 5. The front rolls are carried upon an axle 64 'journaled in a grooved portion 65 of a plate which is loosely hinged by ears 66 upon a rock shaft 67, the latter journaled at its ends in the ends 7, 8 of the platen frame. The plate curves forwardly from said hinge around the under side of the platen, as at 68, the roll or rolls 63 being carried upon the front portion of said curved late. The plate also extends upwardly an rearwardly from the platen as at 69 to form a paper shelf.

A compression spring 70 beneath the plate 68 presses the same up toward the platen and causes the rolls 63 to bear thereon.

The rear roll 62 is journaled at its ends upon a pair of arms 71 which are suspended from screws 72 threaded into the upper part of the paper shelf 69. Spring washers 73 are caused by the screws to press against the arm 71, whereby the roll 62 is pressed against the platen. The axis of the roll 62 is aboutcoincident with the rock shaft 67 upon which the pa er shelf is supported, so that the reaction 0 the roll or the spring arms 71 upon the paper shelf has little or no tendency to turn the. latter upon its hinge. The rock shaft 67 is cranked around the roll 62, as indicated at 74.

Upon the rt .1: shaft 67 which is used for a release shaft, is fixed a releasin arm or finger-piece 7 5. Flats or cutaways 6 are formed upon the inner ends of the two cylindrical portions of the shaft 67, said flats being adjacent to the arms 71 which carry the roll 62, so that when said shaftis turned by means ofthe finger-piece 75, said arms are cammed away from the platen, thereby releasing the rolls 62 and the arms then rest upon the cylindrical portions of the shaft 67, beingthereby locked away from the platen.

Near its extreme ends, said rock shaft is also provided with flats or 'cuta-ways 7 7 and the rear ends of a pair of levers 78 normally occupy saidv cutaways, as at Fig. 5.

When the shaft is rocked, as already de-.

scribed, the levers 78 are cammed upwardly to the F1 2 position, and'their front ends are force downwardly against the ends of the axle 64, thereby throwing the front rolls 63 and the front end of the paper-guiding plate away from the platen; the levers 78 of the first order being mounted between their ends at 7 9 upon the ends of the platen frame. The-rock shaft is turned so far that the levers rest upon the cylindrical periphery thereof, and are locked thereby in abnormal positions. The release key will therefore maintain its release position without attention from the operator, who is left at liberty to use both hands to adjust the paper. Upon restoring the release key 75 to normal position,the rolls are returned by the springs 70 and 73. V

Extendlngealong the top of the platen is a rectangular or edged bar 80 which is fixed upon the forward ends of a pair of arms 81, 82 forming a bail which is hinged at 83 upon the platen frame ends in rear of the platen. Double acting compression-springs 84 act upon the arms 81, 82', to press the bar 80 down toward the platen. When the bar is thrown up, the spr ngs 84 are swung forwardly and bear on the other side of the hinge or axis 83,, so as to hold the bar t away from the platen. Upon the bar I are carried front paper guiding devices, each in front of the platen to guide the pa er up and around thesame. Each spring nger is formed between its ends with a yoke 90, and from the crown of. the yoke extend a pair of cars 91 carrying a roll 92' within the yoke, said roll running upon the front side of the platen. .From the other side of the yoke extends-rearwardly an arm 93 toguide the side edges of the sheets inserted in the machine, and also to serve as a finger-. piece for adjusting the paper along the bar 80. The sheet of paper in emerging from the machine may come up in front of the bar 80, as at 94, or may pass rearwardly beneath thesame, as at 946, Fig. 1.

The platen is provided with a ratchet wheel 95 operated by a pawl 96 carried upon a lever 97. The stroke of the lever is regulated by a metal plate 98 pivoted at 99 upon the end 7. of the platen frame, and having upon its front edge serrations 100, 101, and 102 in the path of the rear end of the pawl 96, said. serrations at graduated distances from the pivot 98 to vary the throw of the pawl, and hence regulate theline-spacing.

Upon its bottom edge, the plate 98 is provided with notches 103 to correspond with the serrations, and a detent 104 is pressed by a spring 105into said notches. The plate is also provided with an upstanding operating arm 106.

The means now be described.

The right hand face of ratchet wheel 95, Fig. 9, is hollowed out to form an internal cone 107 to coiiper'ate with a cone 108, which is provided with a hub 109 and fixed to the platen axle 110 by a pin 111. A thumb nut 112 is threaded upon the axle, and a finger wheel 113 is fixed upon the axle outside of said thumb nut; a corresponding thumb wheel llfheing fixed upon the opposite end of the platen axle. A collar or cap 115 slides loosely in axial direction along the for releasing the platen from the control of the line-space wheel will hub 109, so that when the thumb nut is tight 'ened, it presses the cap 115 against the ratchet wheel 95, forcing the latter against the cone .108, thereby locking the cones, so that the ratchet wheel is positively connected to the axle 110. The platen may be released by turning back the nut 112.

Having thus described my invention, I claim.

1. in a typewriting machine having a froll mounted upon yielding arms which are attached to said plate, the axis of said rear roll being about coincident with the axis of said shaft, and the latter being cranked to clear said rear .roll, a release arm or handle upon said rock-shaft, cam faces formed upon said rock-shaft to force said rear roll away from the platen and detain it'there, and levers mounted upon the ends of the platen frame and operable by cams provided upon said rock-shaft and having means to throw the forward pressure roll away from the platen.

2. In a typewriting machine having a revoluble platen and a platen frame, the combination of a paper-guiding plate hinged in rear of the platen and curving around under the platen and carrying at its for- .ward portion a roll to press against the platen, a spring to press said plate toward tl1e-platen,levers at the ends of the platen frame, and a finger piece, cams operable by said finger-piece to vibrate said lovers to swing the forward portion of said plate away from the platen, and hold it there.

,3. In a typewriting machine having a revoluble platen and a platen frame, the combination of a paper-guiding plate hinged in rear of the platen and curving around under the platen and carrying at its forward portion a roll to press against the platen, a spring to press said' plate toward -the platen, levers at the ends ofthe platen frame, a finger piece, cams operable by said finger-piece to vibrate said levers toswing the forward portion of said plate away from the platen, and hold it there, a roll springpressed against the rear side of the platen, and cams controlled by said finger-piece for moving said rear roll away from the platen and holding it there. i

' 4. In a typewriting machine having a revoluble platen and a platen frame, the combinationof a paper-guiding plate curving around 'the under side of the platen, a rocleshaft journaled upon the ends of the platen frame, said plate having ears whereby it is loosely mounted upon said rockshaft, ,a ,spring pressing said plate up toward'the platen, a pressure roll journaled upon the forward portion of said plate and pressed by said'spring against the platen, a release arm or handle upon said rock-shaft,

cams provided upon said rock-shaft, and levers mounted upon the ends of the platen frame and operable by said cams to throw the forward pressure roll away from the platen.

5. In a typewriting machine having a revoluble platen and a platen frame,.the combination of a paper-guiding plate hinged in rear of the platen and curved forwardly around the platen, a pressure roll carried by said plate at its forward portion, a

spring pressing said roll against the platen,

a spring-pressed roll running upon the rear side of the platen, and a linger-piece having means to release said rolls simultaneously.

6. In a typewriting machine having a revoluble platen and a platen frame, the combination of a paper-guiding plate hinged in rear of the platen and curved forwardly around the platen, a pressure roll carried by said plate at its forward portion, a w

spring pressing said roll against the platen, a springressed roll running upon the rear side of tie platen, and a cam mechanism controlled by a single finger-piece, and having means to move and lock both rolls away from the platen.

7. In a typewriting machine having a revoluble platen and a platen frame,- the combination of a rear paper-shelf inclining downwardly and forwardly to the platen and curving forwardly around the under side of the platen and connected by a hinge to the platen frame, a spring pressin the curved portion of the plate up towar the platen, a roll mounted upon the paper shelf, a spring upon said paper shelf pressing the roll against the rear lower side of the platen, the axis of said roll being about coincident with the axis of said hinge, and a fingerpiece havin means to press said roll away mm the p aten.

8. In a typewritin machine having a revoluble platen and a p aten frame, the combination of a plate connectedby a hinge to,

laten frame, said hinge the ends of the comprising a roe -shaft journaled in t ends'of the platen frame, and cars 11 on the plate to engage said rock-shaft loose y, said plate curvin forwardly around the under side of the p aten from said hinge, and inclining upwardly and rearwardly from said hinge to form a paper shelf, a spring pressing said plate toward the under side of the platen, a pair of spring arms upon said pa er shel a roll carried upon said arms an pressed thereby against the rear under side ofthe platen, the axis of said roll being about coincident with the axis of said hinge, and said rock-shaft being cranked to clear said spring arms in open entl j of each other, and came formed upon sai rock-shaft to force said roll away from the platen.

9. In a typewriting machine having a rev- 7125 said roll, means for ad'ustin the tension of iso of the'platen-frame, a plate having means whereby it is loosely journaled upon said rock-shaft, said plate extending upwardly and rearwardly from said rock-shaft to form a paper shelf, and also curving forwardl der si e of the platen, a spring pressing said curved plate up toward the platen, a roll mounted upon said paper-shelf, s rings upon the paper shelf pressing sai roll against the platen, the axis of said roll being about coincident with the axis of said rock-shaft, and the latter being cranked around said roll, cams upon said rock-shaft to force said roll away from the platen, and

means also operated by said rock-shaft to swing said curved plate away from the platen; a finger-piece being provided for turnin said rock-shaft.

10. a typewritin machine having a revoluble platen and p aten frame, the combination of forward and rear rollsto press against the under side of the laten, ahinged member whereon' the forwar roll is mountfrom said rock-shaft around the un-' ed, yielding means upon said hinged member for pressing the rear roll against the-platen, I

anda finger-piece mounted on the platen frame and having means both to lock the 1 11. In a typewriting machine having a revoluble platen and platen frame, the combination of forward and rear rolls to press against the under side of the platen, a member hinged upon the platen frame and carrying the forward roll, yielding means upon the hinged member for pressing the rear roll against the platen, a rock-shaft mounted upon the platen frame and controlled by -a finger-piece, levers mounted upon the platen frame and engaged by cams u on said rockshaft to swing and lock said hlnged member away from the platen, and cams upon said rock-shaft and acting upon means to lock the rear roll away from the laten. CHA LES W. OWELL.

Witnesses JOHN O. SEIFERT, K. FRANKFORT. 

